Segment Information - Segment Operating Results from Continuing Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Segment Information
Net revenue	$ 12,385	$ 11,588	$ 25,069	$ 23,834
Earnings (loss) from operations	818	841	1,674	1,769
Operating segments
Segment Information
Net revenue	12,408	11,630	25,117	23,742
Earnings (loss) from operations	1,043	1,035	2,049	2,028
Operating segments | Personal Systems
Segment Information
Net revenue	7,662	6,990	15,886	14,457
Earnings (loss) from operations	244	242	557	471
Operating segments | Printing
Segment Information
Net revenue	4,743	4,637	9,226	9,279
Earnings (loss) from operations	825	801	1,541	1,588
Operating segments | Corporate Investments
Segment Information
Net revenue	3	3	5	6
Earnings (loss) from operations	(26)	(8)	(49)	(31)
Eliminations and Other
Segment Information
Net revenue	$ (23)	$ (42)	$ (48)	$ 92